tidey



UNITED STATES PATENT OFFICE.

M. B. TIDEY, OF ITHACA, NEV YORK.

TABLE-GAGE FOR CIRCULAR SAWING MACHINES.

Specification of Letters Patent No. 16,812, dated March 10, 1857.

To all wiz-om t may concern:

Be it known that I, M. B. TIDEY, of Ithaca, in the county of Tompkinsand State of New York, have invented a new and Improved Mode ofConstructing Gages Upon the Tables of Circular Saws; and I do herebydeclare that the following is a full and clear description of the same,reference being had to the accompanying drawings, forming part of thesespecifications, in which- Figure l shows the lower section or bed piecethereofl and Fig. 2 is a reverse view of the same. Fig. 3 is the uppersection or sliding bar and face and Fig. 4 is a reverse view thereof.Fig. 5 is the shaft and pinion which has its bearing in sliding barFigs. 3 and 4t and pinion at recess cavity Fig. 2. Fig. 6 is the thumblever which is received by central or square part of shaft Fig. 5. Fig.7 is the nut which serves upon the end of said shaft and Fig. 11 areWashers which belong thereto. Fig. 12 shows the connection of bed pieceand sliding bar by tongue and groove. Fig. 8 is the combination of theparts referred to. Fig. 9 sho-ws a section of the saw table to the rightof the saw as constructed for the gage .and Fig. 10, shows anapplication of the gage upon the table together with the relativeposition of the saw as invented and constructed by me.

Similar letters of reference indicate corresponding parts in the severelfigures.

The object of this invent-ion is to operate and render portable a guidein a desired connection with circular saws for the purpose of gaging andsawing stuff to a desired width.

To enable those skilled in the art to make and use my invention I willproceed to describe its construction and operation.

The mode of my invention consists in the const-rust-ion of a portablegage of metal and wood and'of several parts, A being the lower sectionthereof having at its bottom several dowels shown at a, a a Fig. 2,which are received by eyes provided in the table b b, c c, d d (Z, Figs.9 and 10, and recess cavity at its bottom shown ate Fig. 2 at one sideof which is a rack shown at g and at its top a converge groove as shownat v1 Figs. 1 and 12.

B is the upper section or sliding bar with face lmto which is attachedwood face or guide n by screws o. said sliding bar there projects atongue z,

From the bottom of' Figs. 4t and 12, corresponding in form with groovez' Figs. 1 and 12 by which it is received. These two parts are connectedby tongue-and groove as seen at z', L, Fig. 12 and shaft and pinion Fig.5, the shaft hav-s ing its bearing 7e in slide bar B at f Figs. 3 and 4and pinion j at recess e, Fig. 2. Th(` central part of said shaft pbeing square receives thumb lever, Fig. 6 at g, by which it is propelledalong the rack g so that the sliding bar B with face or guide a may beadjusted to any desired point within the dist-ance corresponding withthe length of recess c. Upon theeXtremity of shaft, Fig. 5, at r, abovethe lever s there is a worm or spiral thread which receives nut, Fig. 7,by the pressure of which the shaft is drawn up bringing the sides ofpinion j in contact with the projections t t Fig. 2, thereby bringingthe tonguetof sliding bar B snugly into the groove z of bed piece A bywhich in consequence of their Wedge form the bar is brought to a uniformset position, as seen at i L, sectional Fig. 12. Hence the guide or facen is brought to its uniform permanency by the nut /v upon thumb lever s.

u u u, Fig. 11, are washers which serve upon shaft, Fig. 5, on eitherside of thumb lever s and between pinion y' and projections t t.

Fig. 8 shows the several parts described in their proper connection withsliding bar and wood face or guide brought back to their most contractedposition.

Fig. 9 is a section of the saw table to t-he right of the saw asarranged for the gage in which C is a rule indicating the distance ofthe guide n from the saw. From this rule there is an extension plate Ecorresponding with side plates D D all of which are of durable metal andare inserted into the top of the t-able at right angle with the courseof the saw. Through these plates holes are drilled to receive the dowelsfrom the bottom of the gage from which points b b I), c c c, d (Z ai,Figs. 9 and 10, the bore is continued through the table to prevent themfrom filling with dust. The first set of these eyes are to be thedistance from the saw or end of the rule that is denoted by the fullextension of guide a from the dowels of the gage hence when the do-welsare received by eyes b b, and slide bar B is thrown out to its fullcapacity the guide n will be b-rought to the end of the rule or againstthe saw and each succeeding set of eyes to correspond in distance fromthe last with that denoted by I The construction of a portable saW gagethe throw of the slide bar from the bed for the purpose and n the Waysubstantially piece. These eyes may be added at pleasure set forth. bywhich the gage may be carried to any M. B. TIDEY.

5 distance from the saw that may be desired. Vtnesses:

What I claim as my invent-ion and de- WVM; ANGLE,

sire t0 secure by Letters Patent is: WM F. PEER.

